<template>
  <div>
    <div style="margin: 10px; ">
      <el-button type="primary" @click="add">新建</el-button>
      <el-popconfirm
          title="确定删除吗？"
          @confirm="deleteBatch"
      >
        <template #reference>
          <el-button type="danger" >批量删除</el-button>
        </template>
      </el-popconfirm>
    </div>
    <!--    搜索区域-->
    <div style="margin: 10px;">
      <el-input v-model="search" placeholder="请输入ID" style="width: 17%" clearable></el-input>
      <el-button type="primary" icon="el-icon-search" style="margin-left: 6px" @click="load">查询</el-button>
    </div>
    <el-table
        v-loading="loading"
        :data="tableData"
        border
        stripe
        style="width: 100%"
        @selection-change="handleSelectionChange"
    >
      <el-table-column
          type="selection"
          width="55">
      </el-table-column>
      <el-table-column prop="id" label="ID"></el-table-column>
      <el-table-column prop="name" label="书名"></el-table-column>
      <el-table-column prop="price" label="价格"></el-table-column>
      <el-table-column prop="author" label="作者"></el-table-column>
      <el-table-column prop="createTime" label="出版"></el-table-column>
      <el-table-column prop="cover" label="封面">
        <template #default="scope">
          <el-image
              style="width: 100px; height: 100px"
              :src="scope.row.cover"
              :preview-src-list="[scope.row.cover]">
          </el-image>
        </template>
      </el-table-column>

      <el-table-column label="操作">
        <template #default="scope">
          <el-button size="mini" @click="handleEdit(scope.row)">编辑
          </el-button>

          <el-popconfirm
              confirmButtonText="确定"
              cancelButtonText="取消"
              icon="el-icon-info"
              iconColor="red"
              title="确定删除吗？"
              @confirm="handleDelete(scope.row.id)"
          >
            <template #reference>
              <el-button
                  size="mini"
                  type="danger"
              >删除
              </el-button>
            </template>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>

    <div>
      <div class="block">
        <el-pagination
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
            :current-page="currentPage"
            :page-sizes="[5, 10, 20]"
            :page-size="pageSize"
            layout="total, sizes, prev, pager, next, jumper"
            :total="total"
        >
        </el-pagination>


        <el-dialog
            title="新增用户"
            v-model="dialogVisible"
            width="30%"
        >
          <el-form ref="form" :model="form" label-width="80px">
            <el-form-item label="书名">
              <el-input v-model="form.name" style="width: 80%"></el-input>
            </el-form-item>
            <el-form-item label="价格">
              <el-input v-model="form.price" style="width: 80%"></el-input>
            </el-form-item>
            <el-form-item label="作者">
              <el-input v-model="form.author" style="width: 80%"></el-input>
            </el-form-item>
            <el-form-item label="出版日期">
              <el-date-picker v-model="form.createTime" value-format="YYYY-MM-DD" type="date" style="width: 80%"
                              clearable></el-date-picker>
            </el-form-item>
            <el-form-item label="封面">
              <el-upload ref="upload" action="http://localhost:9090/files/upload" :on-success="fileSuccessUpload">
                <el-button type="primary">点击上传</el-button>
              </el-upload>
            </el-form-item>
          </el-form>
          <template #footer>
            <span class="dialog-footer">
              <el-button @click="dialogVisible = false">取 消</el-button>
              <el-button type="primary" @click="save">确 定</el-button>
            </span>
          </template>
        </el-dialog>
      </div>
    </div>
  </div>
</template>
<script>

import request from "../utils/request";

export default {
  name: 'Book',
  components: {},
  data() {
    return {
      form: {},
      dialogVisible: false,
      search: '',
      currentPage: 1,
      pageSize: 5,
      total: 0,
      tableData: [],
    }
  },
  created() {
    this.load();
  },
  methods: {
    deleteBatch() {
      if (!this.ids.length) {
        this.$message.warning("请选择数据！")
        return
      }
      request.post("/book/deleteBatch", this.ids).then(res => {
        if (res.code === '0') {
          this.$message.success("批量删除成功")
          this.load()
        } else {
          this.$message.error(res.msg)
        }
      })
    },
    handleSelectionChange(val) {
      this.ids = val.map(v => v.id)   // [{id,name}, {id,name}] => [id,id]
    },
    fileSuccessUpload(res) {
      console.log(res)
      this.form.cover = res.data
    },
    load() {
      request.get("/book", {
        params: {
          pageNum: this.currentPage,
          pageSize: this.pageSize,
          search: this.search
        },

      }).then(res => {
        this.tableData = res.data.records;
        this.total = res.data.total;
      })
    },
    add() {
      this.dialogVisible = true;
      this.form = {};
      if (this.$refs['upload']) {
        this.$refs['upload'].clearFiles()  // 清除历史文件列表
      }

    },
    save() {
      if (this.form.id) {
        request.put("/book", this.form).then(res => {
          if (res.code === '0') {
            this.$message({
              type: "success",
              message: "更新成功"
            })
          } else {
            this.$message({
              type: "error",
              message: res.msg
            })
          }
          this.load();//渲染数据
          this.dialogVisible = false//关闭弹窗
        })

      } else {
        request.post("/book", this.form).then(res => {
          if (res.code === '0') {
            this.$message({
              type: "success",
              message: "更新成功"
            })
          } else {
            this.$message({
              type: "error",
              message: res.msg
            })
          }
          this.load();//渲染数据
          this.dialogVisible = false//关闭弹窗
        })
      }
    },

    handleEdit(row) {
      this.form = JSON.parse(JSON.stringify(row))
      this.dialogVisible = true
      this.$nextTick(() => {
        if (this.$refs['upload']) {
          this.$refs['upload'].clearFiles()  // 清除历史文件列表
        }
      })
    },
    handleDelete(id) {
      console.log(id),
          request.delete("/book/" + id).then(res => {
            if (res.code === '0') {
              this.$message({
                type: "success",
                message: "删除成功"
              })
            } else {
              this.$message({
                type: "error",
                message: res.msg
              })
            }
            this.load();//渲染数据
          })
    },
    handleSizeChange(pageSize) {
      this.pageSize = pageSize
      this.load()
    },
    handleCurrentChange(pageNum) {
      this.currentPage = pageNum
      this.load()
    },
  },

}
</script>

